Clampseal valves comprise a line of single- and double bellows valves that allow for zero emissions. They are ideal for use in applications where packed valves may not reliably contain light gases or hazardous system fluids, due to leakage in the stem/packing seal area or stuffing box wall/packing seal area. Clampseal bellows seal valves meet all requirements of MSS SP-117, and are available in ½-in. through 4-in. sizes, and in Y, T and angle configurations, through ASME/ANSI Class 2500. Standard materials of construction include carbon steel SA105; chrome-moly SA182-F22, F91; stainless steel SA182-F316, F316L and F347. Options include electric, pneumatic and hydraulic actuators; open, closed or both locking devices; single or dual limit switches; position indicator; and leak-off port. — Conval, Somers, Conn.